Genie Industries Z-30/20, Руководство по обслуживанию

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Part No. 43063 Genie Z-30/20 7 - 15
Service Manual - Third Edition Section 7 - Repair Procedures
PRIMARY BOOM COMPONENTS
3-4
Extension Cylinder
The extension cylinder extends and retracts the
primary boom extension tube. The extension
cylinder is equipped with a counterbalance valve
to prevent movement in the event of a hydraulic
line failure.
How to Remove the
Extension Cylinder
This procedure requires specific
repair skills, lifting equipment and
a suitable workshop. Attempting
this procedure without these skills
and tools may result in death or
serious injury and significant
component damage. Dealer
service is strongly recommended.
1 Raise the primary boom to the horizontal
position. Then extend the boom until the
extension cylinder rod-end mounting bracket
retaining fasteners are accessible.
2 Activate the platform level down function until
the platform level slave cylinder is fully
retracted and the platform is in the horizontal
position.
3 Locate the inspection cover at the platform end
of the extension tube.
4 Remove the inspection cover fasteners, then
remove the inspection cover.
5 Remove the cylinder rod-end retaining bracket
fasteners.
6 Tag, disconnect and plug the extension cylinder
hydraulic hoses. Cap the fittings on the
cylinder.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
to dissipate gradually. Do not
allow oil to squirt or spray.
7 Place blocks under the barrel end of the
extension cylinder for support.
8 Remove the cotter pin from the barrel-end
clevis pin. Remove the clevis pin.
Always use a new cotter pin when
installing a clevis pin.
9 Carefully pull out and properly support the
extension cylinder from the platform end of the
extension tube.
Crushing hazard. The cylinder will
fall if it is not properly supported
when it is pulled out of the
extension tube.
Component damage hazard. Be
sure not to damage the
counterbalance valve block on the
barrel end of the extension
cylinder.
To make installation of the
extension cylinder easier, be sure
that the cylinder rod is extended
2 to 3 feet (0.6 to 0.9 m).